Re: [uml-devel] [uml-user] Kernel panic - not syncing: Kernel mode signal 7 (with 2.6.17.1 and .2)

Re: [uml-devel] [uml-user] Kernel panic - not syncing: Kernel mode signal 7 (with 2.6.17.1 and .2)

[Stefan Hofmann]

Am Samstag, den 01.07.2006, 09:49 +0200 schrieb Stefan Hofmann:

Hi *,

> after upgrading my (host + guest) debian system to 2.6.17.2, I often get
> an uml kernel panic like this:

can anyone help me, please? My systems run very dirty and I cannot use
any 2.6.17.x kernels. Am I alone with this problem? Under 2.6.16.20 I
never saw such a kernel panic.

Host kernel is  2.6.17.3-skas3-v9-pre9
Guest kernel is 2.6.17.3 unpatched

TIA & greetings,
stefan


======================================================================
p2p login: Kernel panic - not syncing: Kernel mode signal 7
 
EIP: 0073:[<400f7d18>] CPU: 0 Not tainted ESP: 007b:bfe00998 EFLAGS:
00000246
    Not tainted
EAX: ffffffda EBX: 00000005 ECX: 08074400 EDX: 00001400
ESI: 00001400 EDI: 08074400 EBP: bfe009b8 DS: 007b ES: 007b
0e98f4d8:  [<080853bd>] notifier_call_chain+0x27/0x3e
0e98f4f0:  [<0805b60c>] relay_signal+0x0/0x97
0e98f4f4:  [<080769e7>] panic+0x70/0x102
0e98f50c:  [<0805b6a3>] bus_handler+0x0/0x5b
0e98f528:  [<0806e42a>] sig_handler_common_skas+0x92/0xe1
0e98f548:  [<0806a2d9>] sig_handler+0x35/0x52
0e98f59c:  [<080d76e5>] do_mpage_readpage+0x19f/0x3f0
0e98f5d4:  [<0806327d>] ubd_handler+0xb8/0xba
0e98f618:  [<080fc86f>] blk_remove_plug+0x39/0x6b
0e98f62c:  [<08063284>] ubd_intr+0x5/0xb
0e98f630:  [<080950eb>] handle_IRQ_event+0x4a/0x6e

======================================================================
exterior.moz login: Kernel panic - not syncing: Kernel mode signal 7
 
EIP: 0073:[<4008d026>] CPU: 0 Not tainted ESP: 007b:bfaff1d8 EFLAGS:
00010206
    Not tainted
EAX: 4014b340 EBX: 4014a8c0 ECX: 00002009 EDX: 083ff8a8
ESI: 083fd8a0 EDI: 00008759 EBP: bfaff210 DS: 007b ES: 007b
0bb6f7b8:  [<080853bd>] notifier_call_chain+0x27/0x3e
0bb6f7d0:  [<0805b60c>] relay_signal+0x0/0x97
0bb6f7d4:  [<080769e7>] panic+0x70/0x102
0bb6f7ec:  [<0805b6a3>] bus_handler+0x0/0x5b
0bb6f808:  [<0806e42a>] sig_handler_common_skas+0x92/0xe1
0bb6f828:  [<0806a2d9>] sig_handler+0x35/0x52
0bb6f87c:  [<080a3808>] do_anonymous_page+0x5f/0x15b
0bb6f8a8:  [<0805cb5e>] do_op+0x50/0x54
0bb6f8b8:  [<0805cbd7>] do_buffer_op+0x75/0x152

======================================================================
template-etch.moz login: Kernel panic - not syncing: Kernel mode signal
7
 
EIP: 0073:[<400e59ae>] CPU: 0 Not tainted ESP: 007b:bf79a474 EFLAGS:
00000212
    Not tainted
EAX: ffffffda EBX: 080a7708 ECX: bf79a4f4 EDX: 40157ff4
ESI: 00000006 EDI: 00000087 EBP: bf79a478 DS: 007b ES: 007b
09f374a8:  [<080853bd>] notifier_call_chain+0x27/0x3e
09f374c0:  [<0805b60c>] relay_signal+0x0/0x97
09f374c4:  [<080769e7>] panic+0x70/0x102
09f374dc:  [<0805b6a3>] bus_handler+0x0/0x5b
09f374f8:  [<0806e42a>] sig_handler_common_skas+0x92/0xe1
09f37518:  [<0806a2d9>] sig_handler+0x35/0x52
09f3756c:  [<080b0503>] alloc_slabmgmt+0x27/0x67
09f375a8:  [<0805a350>] um_timer+0x99/0xa6
09f375c8:  [<08072935>] try_to_wake_up+0x90/0xa5

======================================================================
template-sarge.moz login: Kernel panic - not syncing: Kernel mode signal
7
 
EIP: 0073:[<400d1e53>] CPU: 0 Not tainted ESP: 007b:bf828e48 EFLAGS:
00000246
    Not tainted
EAX: ffffffda EBX: 00000006 ECX: 080a9bf8 EDX: 00001000
ESI: 00000000 EDI: 4015d8c0 EBP: bf828e8c DS: 007b ES: 007b
09c176b8:  [<080853bd>] notifier_call_chain+0x27/0x3e
09c176d0:  [<0805b60c>] relay_signal+0x0/0x97
09c176d4:  [<080769e7>] panic+0x70/0x102
09c176ec:  [<0805b6a3>] bus_handler+0x0/0x5b
09c17708:  [<0806e42a>] sig_handler_common_skas+0x92/0xe1
09c17728:  [<0806a2d9>] sig_handler+0x35/0x52
09c1777c:  [<080b0503>] alloc_slabmgmt+0x27/0x67
09c177ac:  [<0809ad30>] __alloc_pages+0x5c/0x31e
09c177c4:  [<080cd2a3>] inode_init_once+0xcd/0xd3
09c177e0:  [<080f1ca8>] init_once+0x22/0x24




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Re: [uml-devel] [uml-user] Kernel panic - not syncing: Kernel mode signal 7 (with 2.6.17.1 and .2)

[Daniel Tombeil]

Hi,

Quoting Stefan Hofmann <sh@luci.de>:

> Am Samstag, den 01.07.2006, 09:49 +0200 schrieb Stefan Hofmann:
>
> Hi *,
>
>> after upgrading my (host + guest) debian system to 2.6.17.2, I often get
>> an uml kernel panic like this:
>
> can anyone help me, please? My systems run very dirty and I cannot use
> any 2.6.17.x kernels. Am I alone with this problem? Under 2.6.16.20 I
> never saw such a kernel panic.

I had similar looking panics and in my case it was a problem with  
tmpfs running out of space. tmpfs can be in various locations. In my  
case /dev/shm was used and it was far to small. I found that out using  
lsof and grepping for my UML instances.

hope this helps

               Daniel


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Re: [uml-devel] [uml-user] Kernel panic - not syncing: Kernel mode signal 7 (with 2.6.17.1 and .2)

[Stefan Hofmann]

Am Montag, den 03.07.2006, 10:33 +0200 schrieb Daniel Tombeil:

Hi Daniel,

> > can anyone help me, please? My systems run very dirty and I cannot use
> > any 2.6.17.x kernels. Am I alone with this problem? Under 2.6.16.20 I
> > never saw such a kernel panic.
> 
> I had similar looking panics and in my case it was a problem with  
> tmpfs running out of space. tmpfs can be in various locations. In my  
> case /dev/shm was used and it was far to small. I found that out using  
> lsof and grepping for my UML instances.
> 
> hope this helps

yes, this was the reason. Many thanks for your tip.
I had a hugde swap space and therefor a big tmpfs in /tmp and /var/tmp
but my /dev/shm was just 512MB and this is a joke for 8-12 UML
instances. Maybe the 2.6.17.x kernel uses more /dev/shm(?); this problem
never occours before.

Now my shm is about 2G and the host and all UMLs are well alive :)

Thanks and greetings,
stefan




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